An in-depth evaluation on the influences of elevated temperature ECAP on mechanical properties and corrosion behavior of copper metal

An in-depth evaluation on the influences of elevated temperature ECAP on mechanical properties and corrosion behavior of copper metal | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article An in-depth evaluation on the influences of elevated temperature ECAP on mechanical properties and corrosion behavior of copper metal Sayed Hassan Nourbakhsh, Saeed Yaghoubi, Mahmoud Pezeshki, Mojtaba Vakili-Azghandi, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-5604739/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 14 Apr, 2025 Read the published version in The International Journal of Advanced Manufacturing Technology → Version 1 posted 5 You are reading this latest preprint version Abstract The need for large amounts of force in the equal channel angular pressing (ECAP) process has always caused problems and limitations in conducting it. In the current study, elevated temperature ECAP process is proposed as an approach to reduce force and its effects on the microstructural and mechanical properties of copper metal has been investigated, comprehensively. The research results showed that due to the phenomenon of recrystallization and the creation of refined and equiaxed grains, the microstructure of copper and its resistance to corrosion was improved. Accordingly, the stress concentration created in the triple points was decreased and, consequently, the fracture toughness of the material increased. Based on the present findings, the crack growth becomes intergranular, so the crack growth path becomes longer. Moreover, only one component of the applied force causes the crack to grow, as a result, the resistance of the material increases. Therefore, for example, the fatigue crack growth range threshold of the material subjected to the ECAP process was 3.5 times larger than those of the base metal (BM). Also, it can increase ultimate strength up to 65.4%, hardness up to 89% and impact toughness up to 91.9%. In addition, it was found that if the ECAP process is performed at elevated temperatures, the maximum required force can be reduced by 45.6%. Fatigue crack growth Corrosion Mechanical properties ECAP Copper Full Text Supplementary Files Graphicalabstract.tif Highlights.docx Cite Share Download PDF Status: Published Journal Publication published 14 Apr, 2025 Read the published version in The International Journal of Advanced Manufacturing Technology → Version 1 posted Reviewers agreed at journal 23 Mar, 2025 Reviewers invited by journal 23 Mar, 2025 Editor assigned by journal 19 Mar, 2025 First submitted to journal 18 Mar, 2025 Editorial decision: Minor Revisions Needed 02 Feb, 2025 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-5604739","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":432688201,"identity":"cd12cfd2-d479-4591-a28c-8a2f7dcd1dcc","order_by":0,"name":"Sayed Hassan Nourbakhsh","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Sayed","middleName":"Hassan","lastName":"Nourbakhsh","suffix":""},{"id":432688202,"identity":"47a2d5d1-2222-4a63-8d3e-96ab7d7ea131","order_by":1,"name":"Saeed 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In the current study, elevated temperature ECAP process is proposed as an approach to reduce force and its effects on the microstructural and mechanical properties of copper metal has been investigated, comprehensively. The research results showed that due to the phenomenon of recrystallization and the creation of refined and equiaxed grains, the microstructure of copper and its resistance to corrosion was improved. Accordingly, the stress concentration created in the triple points was decreased and, consequently, the fracture toughness of the material increased. Based on the present findings, the crack growth becomes intergranular, so the crack growth path becomes longer. Moreover, only one component of the applied force causes the crack to grow, as a result, the resistance of the material increases. Therefore, for example, the fatigue crack growth range threshold of the material subjected to the ECAP process was 3.5 times larger than those of the base metal (BM). 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